a hormone in lizards and people
a type of tree lizard
a chemical that is higher in women than in men
a type of lizard behavior
They have different colored dewlaps
They have more testosterone and progesterone when they are babies
They are more aggressive
All of the above
They have territories
running away from a fight
reading a book
sharing toys at the playground
starting a fight
he gives them more food
he threatens to bite them
he gives them territories with lots of females
he gives them more testosterone or progesterone
catching insects
warming themselves in the sun
changing their hormone levels
communicating with other lizards